def triangle():
    side_length_one = int(input("请输入第一个边长：\n"))
    side_length_two = int(input("请输入第二个边长：\n"))
    side_length_three = int(input("请输入第三个边长：\n"))
    if (side_length_one + side_length_two > side_length_three and
            side_length_one + side_length_three > side_length_two and
            side_length_two + side_length_three > side_length_one):
        return "能构成三角形"
    else:
        return "不能构成三角形"
print(triangle())
